diff --git a/Cargo.lock b/Cargo.lock
index 5871330fb..ee46f0bb0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -90,9 +90,9 @@ dependencies = [
 
 [[package]]
 name = "approx"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f2a05fd1bd10b2527e20a2cd32d8873d115b8b39fe219ee25f42a8aca6ba278"
+checksum = "072df7202e63b127ab55acfe16ce97013d5b97bf160489336d3f1840fd78e99e"
 dependencies = [
  "num-traits",
 ]
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 1ed062a40..1356db70a 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -44,7 +44,7 @@ version = "0.1.22"
 default-features = false # can't use rayon on web
 
 [dev-dependencies]
-approx = "0.4.0"
+approx = "0.5.0"
 pretty_assertions = "0.7.2"
 env_logger = "0.8.3"
 
diff --git a/swf/Cargo.toml b/swf/Cargo.toml
index 1d1b709ed..996322391 100644
--- a/swf/Cargo.toml
+++ b/swf/Cargo.toml
@@ -23,7 +23,7 @@ flate2 = {version = "1.0", optional = true}
 lzma-rs = {version = "0.2.0", optional = true }
 
 [dev-dependencies]
-approx = "0.4.0"
+approx = "0.5.0"
 
 [features]
 default = ["flate2", "lzma"]
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index e56b15bce..3526a37e8 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -10,6 +10,6 @@ edition = "2018"
 ruffle_core = { path = "../core" }
 
 [dev-dependencies]
-approx = "0.4.0"
+approx = "0.5.0"
 pretty_assertions = "0.6.1"
 env_logger = "0.8.3"